Patrick b



(No Model.)

P. B. DELANY.

ELECTRICAL sYNoEEoNoUs MOVEMENT.

No. 286.273. Patented om.. 9, 188s.

UNITED STATES PATENT OFFICE.,

PATRICK DELANY, OF NEYV YORK,

N. Y., ASSIGNOR TO THE STANDARD ELCTRICAL SYNCHRONOUS MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 286,273, dated October 9, 1883. Application tiled April 12, 1S83r (No model.)

To all whom it may concern.-

Be it known that I, PATRICK B. DELANY, of

thc cit-y, county, and State 'of New York, have invented certain new and use'tul Improvements in Electrical Synchronous Movements, ot' which the following is a specification.

In several applications for Letters Patent of the United States, filed simultaneously herewith, I have shown several arrangements of 1 O apparatus for obtaining the synchronous movement of instruments situated at different places and connected by an electric circuit. IVhile in these applications several means of obtaining and maintaining a synchronous movement 15 are illustrated, the applications are alike in hat they all show a circular table of insulated contacts, some of which contacts are connected up in different elect-ric circuits and used either l'or telegraphic or other purposes,

2O and the remainder of the contacts devoted to maintaining` the synchronous movement oi" the apparatus. The applications referred to were all tiled ot' even date herewith, and are serially numbered 91,489, 91,i90, 91,491, 91,492, and 91,493. In working such apparatus upon long lines the static induction created in the line is apt to interfere not only with the transmission of telegraphic messages or ot' electrical inip Lilses for any purpose, but also interferes with 3c, the correcting or regulating impulses which are transmitted over the line when the appalratus at either station tends to run out ot' time with that at the other station.

The object of my present invention is to provide a means whereby the injurious static inductive effects may be absolutely and entirely obliterated on lines of any length, so that the apparatus works with as absolute accuracy as il' such induced currents did not exist.

. o Figure 1 of the accompanying drawings illustrates two stations, X and Y, connected by a main line; and Fig. is a detail view of a m odiiit ation.

At each station a circular table of insulated a 5 contacts, T, is shown, and a trailing-tingen 1", which is carried by a vertical shaft, to which the armature-disk F is i'ast, the disk being rotated by a motor-magnet, G G, placed in a motor-circuit, which is made and broken by the vibrations of a tine of a fork, II, which is automatically vibrated by' a magnet, I I, included in a local-battery circuit. The motorcircuit is indicated by the broken line, and thelocal vibrating circuit bythe dotted lines. The poles of the magnet I I are provided with 55 screw-extension pole-pieces i, which may be adjusted to or from the tines ot' the fork to regulate its speed of vibration. A shunt-resistance, It, is placed in the motor-circuit to prevent sparksV between the contacts a b, and 6o a similar resistance, It', is placed in the local vibrating circuit, to prevent sparks between the contacts a b. Sixty contacts at each station are shown, and are numbered in six independent series from 1 to 10. Two contacts in 65 each series are shown as connected up in an independent circuit, of which there are four, as clearly illustrated, thus leaving the 9s and 107s in each circuit for maintaining synchronism. The apparatus at each ot' the stations is illustrated diagraminatically. The table ot' contacts T is stationary, and the armaturedisk E, which is rotated by the motor-magnets, is fast on the vertical rotary shalt F', which is connected with the line and carries a radial 7 5 arm, and a trailing-tingen f, which completes the electric circuit from the contact at one station over the line to the corresponding contact at the other station. This description is sutlicient to enable any one skilled in the 8o art to construct an apparat-us vfulfilling the necessary conditions. The apparatus is, however, illustrated and described in detail in au application for improvements in telegraphytiled siv multaneously herewith, and numbered 91,493, 8 5 and patented of even date with this, which application shows an apparatus identical with that herein illustrated, with the exception ol' the devices for preventing static disturbance, and any very detailed description of the op- 9o eration is therefore superuous here.

As the corresponding apparatus at each station, whatever it may be, is connected with the corresponding contacts, the circuit will he completed between those instruments whenev- 9 5 er the synchronously-moving fingers at the two stations rest upon thc contacts with which they are connected. It' the vibrator is vibrated at the rate of eighty-tive per second, and there are thirty teeth in the armature-disk, the trailing finger will beY rotated nearly three times per second; and, as under the organization shown, the corresponding instruments at eachV station are connected to two ofthe contacts in each ofthe six series, they will be placed in communication twelve times for every rotation of the trailing Iingers, or thirty-four times per second. The circuit is therefore practically unbroken. The synchronous movement of the apparatus is maintained as follows: At station X, three of the 9s farthest removed from each other are connected together and toV battery K, and that'three of the lOs farthest removed from each other are connected to each other and to aline, 1, which passes through two correcting or regulating coils, I I', on the cores of the vibrator-magnet I I, and thence to ground. The remaining three intermediate 97s and lOs are thrown out or unconnected with any circuit. At station Y the 9s corresponding to those connected to the battery at station X are thrown out,while the alternate Qs which correspond with those thrown out at station X are connected with the battery K', and the lOs at station Y, which are connected with each other and with the 4 correcting-coils I/ Il on the cores of the vibrator-magnet, correspond with those which were thrown out at station X, the 107s at station Y corresponding to the connected lOs at station X being also thrown out or unconnected. At

both stations the three lOs which are connected with the lcorrecting coils on the cores of the -.vibrator-magnet are built out or extended toward the adjoining 9s, which are not connected with any circuit. IVhen the trailing contact-arms j" at both stations are moving synchronously and rest on corresponding contacts, and on about the same portions of those contacts, the four independent circuits will successively be completed, as described. If the apparatus at Y runs a trifle faster than that 'at X, the finger f at Y will touch the extendcd side ot'al() contact, while the finger at X is still on a battery-,connected v9, a current or impulse of electricity will be sent from the battery K through the contact 9, and iingerfat' station X, overvthe line and through the contact l() and line 1, to the coils mounted on the cores ofthe vibrator-magnet I. The effect of this pulsation of electricity is to increase the power of the vibrator-magnet and momentarily slow the vibration ot' the fork and the rotation of the armature disk and finger, and the trailing contact-finger j' will immediately drop back into its proper relative position. The poles of the vibrator-magnet are placed on the outside of the tines, so that the tines vibrate in magnetic fields, which modify or in a measure overcome the normal speed of vibration. As this magnetic eld is decreased in strength ,the tines vibrate more freely, and consequently more rapidly. W'hen, however,

these exterior' magnetic fields arc increased or Exactly theb same operation occurs if the contact-iinger f at station X moves faster than that at station Y. There is, therefore, an automatic mutually-compensating correction from either end of the line, as the apparatus at one station moves faster than that at the other. As the connected lOs are extended toward the adjoining 97s, a variation of speed very much less than that suiiicient to carry one trailing finger across the space between any two of the other contacts is immediately corrected, and there is no danger, therefore, of any disturbance by bridging tion is corrected. kAt station Y one of the thrown-out 9-contacts is connected to ground through a ticker or sounder, T, and when the apparatus is running synchronously there will be a stroke on the ticker at each revolution of the trailing finger. WVhen the operator, therefore, hears a continued sound on the ticker, he knows that the instruments are running synchronously.' y

In starting the apparatus the vibrator at station X is putin motion, as hereinbefore described, and the adjustment of the apparatus is completed by the operator at station Y.

vThe fork at Y is started into vibration, and

the switch M, between the connected 9s and the battery K, and the switch N, between the connected lOs and the correcting-coils, are left open. If the trailing fingers happen to start in synchronism, the sounder T will tick, and if the ticking continues for a short time the operator will know the apparatus is synchronous and closes the switches M and N, and the apparatus is in working condition. If the apparatus does not start in synchronism, there will be no sound at iirst on the ticker T, but the operator at station Y, by screwing the polepieces away from the tines of the fork, will cause them to vibrate at a speed which, by previous understanding, lie will know to before the varia- IOO IIO

be very much greater than that of the fork at the distant station. The finger at Y will therefore gain rapidly on the linger at X, and as they occasionally come into conjunction there will be a stroke on the sounder. Then, bygradually adjusting the pole-pieces to approach them to the tines of the fork, the strokes on the sounder will become less frequent, and by continuing the adjustment the fingers will travel together suiiicientlylong to give a series of ticks on the sounder, and when the ticking on the sounder continues for several seconds or more the switches M and N are closed, and the apparatus is in proper condition, any subsequent variation being automatically corrected, as above described. As the circuit is made and broken many times in each revolution of the trailing fingers, and as the duration of contact between the iingers and the insulated contacts is very brief, the static ro in the drawings.

discharges from the line at each completion of the circuit are so disturbing, as on long lines, to destroy the synchronous movement of the apparatus. In order to overcome this diiiiculty and to absolutely guard the successive momentary completions of the circuits from the injurious and disturbing effects ofthe static discharge, I place between each oi' the contacts a thin insulated Contact, indicated by e These extrastatic contacts are connected together at each station and put to ground. Vhen, therefore, the trailing iingers in rotating pass from one contact, and a static current is created in the line, the finger I 5 strikes the static contact e and the static discharge is put to the ground. The line therel'ore is completely discharged before the circuit is completed through the neXt insulated contact, and as the trailing iingers rotate the line 2o is discharged before reaching the successive contacts. By this arrangement all disturbing efects from static induction are absolutely pre- 'vented, and the system works as perfectly as if such currents did not exist.

I have fully described the operation ot the system shown in the drawings; but my invention is not dependent upon that special organization, but is clearly applicable to the various synchronous movements illustrated in the applications iiled simultaneously herewith.

Instead of arranging the static dischargecontacts upon the stationary table, they may be carried on a separate disk in proper relation to the contacts, and the ground-connection be completed by a eontaet-iinger, as illustrated in Fig. 2.

I have described the discharge or ground contacts as being for the purpose oi' discharging the line oi' static or inductive currents;

4o but, oi' course, any charge on the line will be put to ground as the apparatus rotates.

Any subjects-matter herein shown or described, but claimed in fases 91,489, 91,490, 91,491, 91,492, or 91,493, iiled of even date herewith, or No.102,928, tiled August 6, 1883,

are disclaiined herein.

lVhat I claim as my invention is 1. The combination, substantially as set forth, of two electrically-connected stations,

5o a vibrator at each station, motor circuits and magnets, and rotary circuit-completers driven thereby, circular tables of contacts, some of the contacts thereon being' apportioned into circuits tor the transmission ot electrical impulses for any purpose, other contacts thereon 6o which electrical impulses are sent to correct the speed ol.'y the vibrators, and static discharge-contacts placed between each of the contacts on thetables'oi contacts and connectcdto the ground.

2. The combination ot' a main line, a series of like contacts electrically connected in independent groups, so that each contact is connected in a dii'i'erent group from the adjoining contacts, means for successively completing the line-circuit through said contacts, and a series of line-discharge contacts electrically connected with the ground, placed between the firstnamed contacts, so that the line is discharged to earth before the completion of the circuit through each of the first-mentioned contacts.

3. The combination, substantially as set forth, of a main line, a series of like contacts arranged in a circle and electrically connected in independent groups, so that the circuit oil each. group is connected with a number of the contacts placed at intervals around the circle, a circuit-completer which traverses the circle and successively and rapidly makes and breaks the line-circuit through each of the contacts, whereby the circuit of each group oi' contacts is placed in connection with the main line a number of times in each traverse of the circuit-completer, and a series of line-discharge contacts connected with the ground placed alternately between the first-mentioned contacts, so as to alternately make the main-line circuit through each ofthe first-named contacts-and discharge the line to ground through each of the discharge-contacts.

4. The combination, substantially as set forth, at electrically-connected stations, of a series of contacts at each` station, some oi' which are connected for use, as described, and others of which are devoted to maintaining the synchronous movement of the apparatus, mechanism at each station for successivelyv making and breaking theline-connection with said contacts, electrically-controlled apparatus for continuously actuating such mechanism, means for automatically correcting the speed of said circuit-breaking mechanisms reciprocally from one station to the other whenever they run out of time by impulses of electricity received from the distant station through the correeti11g-contacts, and a series ot' line-discharge contacts connected with the ground through which the line is discharged before its connection with each of said iirst-named contacts.

In testimony whereof I have hereunto subscribed my name this 3d day oi' April, A. D. 1883.

PATRICK l. DELANY.

ll'vitnesses:

Enwn. A. Cami-MN, H. D. B'IvNsoN.v

IIO 

